Find Python 3 interpreter and libraries in CMakeLists
Find Python 3 interpreter and libraries in CMakeLists

Moreover, this commit fixes the order of commands in CMakeLists.
According to CMake documentation
https://cmake.org/cmake/help/latest/module/FindPythonInterp.html
If calling both find_package(PythonInterp) and
find_package(PythonLibs), call find_package(PythonInterp)
first to get the currently active Python version by default
with a consistent version of PYTHON_LIBRARIES.

OpenSCAP/openscap,redhatrises/openscap,jan-cerny/openscap,redhatrises/openscap,jan-cerny/openscap,OpenSCAP/openscap,jan-cerny/openscap,redhatrises/openscap,mpreisler/openscap,OpenSCAP/openscap,mpreisler/openscap,mpreisler/openscap,redhatrises/openscap,redhatrises/openscap,OpenSCAP/openscap,jan-cerny/openscap,OpenSCAP/openscap,jan-cerny/openscap,mpreisler/openscap,mpreisler/openscap,redhatrises/openscap,jan-cerny/openscap,mpreisler/openscap,OpenSCAP/openscap